Jul 182008
 

Further progress on the stealthy aircraft being modelled in Rhino. The forward fuselage is packed with complex curves, and there’ve clearly been some issues in modeling them… still, it’s looking like what it’s supposed to.

rhino3a.jpg  rhino4a.jpg  rhino5a.jpg  rhino6a.jpg  

 Posted by at 5:32 pm
Jul 172008
 

As the Space Park effort showed, I’m reasonably good at modeling in CAD. However  the CAD program I use has some serious limitations as far as the sort of shapes it can model as solid objects…. anything with organic contours is pretty much right out. But Rhino 3D is advertised as being the solution to that. So some while back I bought a copy and promptly ignored it. However, I’ve fired it up, and here’s the first project: an early 1970’s North American Rockwell stealthy ground attack plane.  This is just a first stab at a model and is pretty wrong in some ways; much left to do. Still, at the very least it didn’t explode, so that’s something.

rhino5.jpg  rhino7.jpgrhino6.jpg  rhino8.jpg

 Posted by at 10:13 pm
Jul 172008
 

Dated 10-13-45, this bit of artwork is all I have on the Bell D-35. Clearly a single seat jet or rocket driven aircraft. Beyond that… shrug.

image147a.jpg

 Posted by at 1:45 pm
Jul 162008
 

Finally wrapped up the Space Park tonight. Numerous hours were spent in re-building a few things… one advantage that physical modeling has over virtual is that the part doesn’t suddenly start spitting error messages at you. Nevertheless, the problems were solved and the model completed. Shown here are the parts breakdown as well as the parts layout for stereolithography. Now to get quotes…

spaceparkparts2a.jpg spaceparkparts1a.jpg spaceparkpartssprue2aa.jpg  spaceparkpartssprue2ba.jpg

spaceparkpartssprue2ca.jpg   spaceparkpartssprue2da.jpg

Irritatingly, the blog software won’t make thumbnails of all of the images… too big, I guess. So click on the titles to see ’em.

 Posted by at 12:48 am
Jul 152008
 

It’s in the nature of a business enterprise to try to sell as much of their product as they can. This means trying to open new markets… roles your existing products may not have originally been designed for. United Technologies tried to do that in the mid 1960’s with a series of concepts for launch vehicles using derivatives of their UA-1205 solid rocket booster for the Titan. Instead of simply being boosters, though, the solids were intended to be complete stages, and in some cases the entire vehicle. Shown here is a Saturn-class booster that uses solids for the first and second stages, with a small liquid third stage to orbit an Apollo command and service module. The perceived advantage of a system like this over a conventional Saturn was faster availability… like a Minuteman ICBM, most of the vehicle would be ready to go at a moments notice. But NASA didn’t need that, and the USAF seemed unimpressed.

solid1.jpg  solid2.jpg

 Posted by at 10:48 am